Common Eagle Ray

Fascinating facts about the Common Eagle Ray

• Imagine a wing-shaped fish that can stretch almost two metres long – up to 183 cm – with a disc as wide as about 80 cm. Females usually outgrow males, making the biggest individuals true giants of the shallow seas. This size lets them glide powerfully over sand, turning a routine glide into a silent, sweeping hunt.
• Its sting isn’t just a prick; the tail spine makes up about 70 % of a male’s total length and 65 % of a female’s, and the venom-injecting groove runs along 10–40 % of the tail. Though the venom rarely harms people, the anatomy shows how evolution turned a simple tail into a sophisticated defense weapon.
• Instead of sharp teeth, this ray crushes shells with flattened hexagonal plates arranged like a mosaic on its jaws, breaking open crustaceans and bivalves as if they were peanuts. That dental design lets it exploit a diet of hard-shelled invertebrates that many predators can’t touch, carving out a unique niche on the ocean floor.
• When it’s time to breed, dozens of rays gather in a seasonal underwater conference, each female carrying three to seven embryos for a gestation of six to eight months before giving birth to live pups. This communal breeding strategy boosts the chances that enough young survive in waters increasingly touched by fishing.
• A trawl net pulls up one of these rays every 20 hauls in the Adriatic Sea, and about 79 % of the catches are tossed back alive. Most are snagged between April and September at depths of 20–40 m, showing that even reduced bycatch still pressures a species already slipping toward rarity.

At a glance

About the Common Eagle Ray

The common eagle ray, Myliobatis aquila, glides through the eastern Atlantic, Mediterranean, and southwestern Indian waters with a sleek, rhomboidal disc that can reach 183 cm in length and a wing-like span of up to 80 cm. Its dorsal surface shimmers in shades of brown or black, while the belly is stark white, a contrast that hints at its open-water lifestyle. Females outsize males, and both sexes bear a long, slender tail crowned by a single, formidable spine that occupies roughly two-thirds of the tail’s length. Beneath the smooth skin, a mid-dorsal groove houses venom-producing glands, a reminder that this graceful swimmer carries a potent defense. In shallow sandy flats, often less than 50 m deep, but also down to 800 m, the eagle ray forages for benthic invertebrates, crushing crustaceans, bivalves, polychaete worms, and sea pens with its mosaic of hexagonal, plate-like teeth. Larger individuals add small fish to their menu, reflecting a shift in diet as they grow. A surprising trait is its reproductive strategy: the ray is oviviviparous, nurturing three to seven embryos inside the mother for six to eight months, first on yolk then on uterine secretions, before birthing live pups that immediately take to the sea. Groups of dozens gather during this period, a fleeting spectacle of communal breeding that hints at a complex social rhythm beneath the waves.

More fish to discover

Browse Feravox